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2 Sheets-Sheet i.. c.wH|PPLE.

Machine for Shaving the Heade of Screw Blanks.

Patented Aprii 6, 1843.

iii im y 2 Sheets-Sheet '2.

C. WHIPPLE.

Machine for Shaving the Heads of Screw Blanks.

Patented Apri 6, 1843.

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Unlrnn PATENT-formen.

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To all whom it may concern.'

Be it hnevn that l, CULLEN Wnrrrrr, 0f the City ef, lrevidenee in the eenntv ef Providence and State of Rhode Island, have invented certain improvements in the Ina- Chine fer turning 0r Shaving the heads et the blanke which are te he ferrned inte Weed-Shreve, which l denominate the Seif- Onereiing shaven end I de hereby Ydeelere that the following ie a hdl and erect de scription thereof.

In the machines heretofore used OI turning, or shaving, the heads of blanks, the tool, or cutter, by which they were iunished was brought up against them by hand; but in my improved machine the parts are made selfacting, by means of cams and levers, and other devices connected therewith, arranged for that purpose, in a manner to be presently described.

In the accompanying drawing, the machine is represented, in the first three figures, of one half the ordinary size.

Figure 1, is a side,and Fig. 2, a front, elevation of it. Fig. 3, is a plan, or top view, and Fig. 4, a section along the middleof the pulley shaft, showing the manner in which the jaws are made to operate by means of the slide bolt; this last figure is drawn to the full size.

A, A, is the frame of the machine, which is made of cast-iron. C, C, is a tubular, or hollow, arbor, or spindle, which is sustained by, and runs in, the heads A', A. The arbor, or spindle, C, is driven by a band on the whirl, or pulley, D; and it is widened out at its end C', so as to constitute two cheeks which embrace the jaws E, E. Through the tubular arbor C, the sliding bolt F, F, passes, and serves to close the jaws E, its wedge-formed end F', passing in between the tails a, a, of the j awsfor that purpose. The sliding bolt F, bears, at its outer end, against a regulating screw G. This screw passes through the head H, of the lever H, which has its fulcrum at I;

when the end H2, of this lever is depressed, v

its end H', will force the bolt F, forward, and cause the jaws E, to close, and embrace the blank which is to be turned. The lever H, is depressed vby means of a cam J, which is carried by a cam shaft K, K. The cam J, as it revolves, operates upon a lever L, having its fulcrum at L2, the short arm of which, L', serves to depress the end H2, of

the .lever H, during the time that its lensA erin rests nnen the periphery .ef Jehe eem J, The lever H, has a hardened roller M, near its end H?, upon which L', bears. As repre-` sented in the drawing, Fie l, Ithe lever L, is relieved' freni its action en .the lever H, by its having fallen inte the recess between the Peints J, J", ef ihe eem J `the Weight Hi, Serves .te reise the lever H- The arbor C, C, and the .Sliding belt F, F, then fall beek, release the blank that has been turned, and allow a ,neviI ene te-be fed in There iS. e SeCQnd Cain N, N, ,Carried by the Shaftv K, whieh earn Serves te advance the tool, er cutter, O, againstthehead to be turned. This. i001, er entier, .dees net .differ from those used in other machines for turning the heads of screws. P, is a lever upon which the cam N, operates to raise the cutter, and carry it regularly against the heads of the blank; the fulcrum of this lever is at Q. P', is a branch of the lever P, which by the aid of the set screw P, allows the action of the cutter to be accurately graduated. The periphery of the cam J, is. equidistant from its center K, but that of the cam N, has a gradually increasing diameter, to cause the cutter to advance gradually, as it takes a shaving off the head. The cutting part of the tool is so formed as to cut both the top and bevel of the head at the same time. v Y

On the same shaft with the cams there is a large spur wheel R, and mot-ion is given to this wheel by means of a tubular pinion S, on a third shaft T, the bearings of which shaft are on the standards A2, A2. The shaft T, also carriesV the large band wheel U, U, which receives a band from a small band wheel, or whirl, V, on the shaft- C. The shaft C, and the brand wheel U, have their motion continuous, the bandfaround the whirl V, and the wheel U, connectingthese two parts. W, is a sliding clutch box, having the pinion S, attached to it; and these are moved back and forth bythe shipper X, which is governed by the handle Y, a

wheel R, at the proper time for'removing a nished, and feeding in a new, blank, that is to say, at the period when the cams cease to act upon the levers P, and L, there `is a pin p, projecting from the shipper X, at its upper end, on the side opposite'to that seen in Fig. l, which pin points toward the wheel R, and said wheel has a hole in its side, as at ci', Fig. l, into which said pin will fall when the wheel comes around to the proper point. the shipper X, for the purpose of forcing said pin into the hole, and of arresting the wheel. There is a gage pin d, within the cheeks C', against which a blank, e, is stopped when fed in; this pin is regulated by a set screw f, to suit blanks of different lengths. B, is a rest which sustains the blank while it is being turned. Within the jaws E, E, there is a spring g, g, by which they are opened, and the blanks relieved as the bolt F, recedes. The feeding is effected by passing the blank in between the jaws on the side shown in Fig. 1, where B', is the head of a blank inserted ready for the shaving, or turning, by the tool O. When it has been turned, and the jaws are opened,

The spiral spring e', draws upon of the cams J, and N, with the leversVL,-P, v

and H, in combination with the jaws spindles, and sliding bolt, A, so Yas to govern the gripping and releasing ofthe blank, and the moving up and withdrawing of the turning tool, by the operation ofthe respective parts constructed and combined substan# tially as herein set forth. 'Y j f v ,CULLEN WHIPPLE. Witnesses:` Y

JAMES WILsoN, HENRY MARTIN. 

